Boron Lewis Acid-Catalyzed Hydrophosphinylation of <i>N</i>-Heteroaryl-Substituted Alkenes with Secondary Phosphine Oxides
作者:Jimin Han、Jongwon Kim、Jaehoo Lee、Younghun Kim、Sarah Yunmi Lee
DOI:10.1021/acs.joc.0c02246
日期:2020.12.4
secondary phosphine oxides that furnishes various phosphorus-containing N-heterocycles. This process proceeds under mild conditions and enables the introduction of a phosphorus atom into multisubstituted alkenylazaarenes. The available mechanistic data can be explained by a reaction pathway wherein the C–P bond is created by the reaction between the activated alkene (by coordination to a boron catalyst)
Rhodium–<i>N</i>-Heterocyclic Carbene Catalyzed Hydroalkenylation Reactions with 2-Vinylpyridine and 2-Vinylpyrazine: Preparation of Nitrogen-Bridgehead Heterocycles
作者:Ramón Azpíroz、Andrea Di Giuseppe、Vincenzo Passarelli、Jesús J. Pérez-Torrente、Luis A. Oro、Ricardo Castarlenas
DOI:10.1021/acs.organomet.8b00149
日期:2018.6.11
alkynes undergo C–C coupling to yield 2-(butenyl)pyridine or 2-(butadienyl)pyridine RhCl(NHC)κ-N,η2-CH(R)═CH(C5H4N)} complexes by formal hydroalkenylation of the unsaturated bond by vinylpyridine. Reaction of the dinuclear precursors with 2-vinylpyrazine in the presence of pyridine affords the η2 derivative RhCl(IPr)η2-CH2═CH(C4H3N2)}(py). Compound RhCl(IMes)(κ-N,η2-CH2═CHC5H4N) is an efficient catalyst